I found a way to set it using Terminal: osascript -l JavaScript <<EndOfScript ObjC.import("LaunchServices") $.LSSetDefaultHandlerForURLScheme(ObjC.wrap("tel"), ObjC.wrap("com.apple.mobilephone")) EndOfScript Replace "tel" with the type of URL to handle, and "com.apple.mobilephone" with the identifier of the app to handle those URLs. To find the identifier of an app, run: osascript -e 'id of app "Phone"' replacing "Phone" with desired app name. F.e. "Safari" or "Safari.app".

I'm just a regular macOS 26 user here, but I noticed this option is gone too. Whenever I try to make a call in the new native macOS 26 Phone app, it focuses my Edge browser. I'm not sure when or how I made Edge handle telephone calls (including tel: links), but it is very annoying because I am unable to change the app that makes calls, and therefore I cannot get my cross-device Phone experience to work well.

For reference in case the above example stops being available or changes, this example is permanently available since time of writing: https://rawcdn.githack.com/immersive-web/model-element/ed579b5ad3fdca3bca2805e182624a23d367b534/examples/assets/FlightHelmet.usdz

I can confirm, it doesn't work right now. With this example, https://raw.githack.com/immersive-web/model-element/main/examples/index.html in macOS M1 I get a blank rectangle: and in visionOS I get the image fallback: I do see that model.constructor is HTMLModelElement, and model.getCamera() eventually gives the error Unhandled Promise Rejection: undefined so the API is there, just not working yet It is experimental behind a flag, so the WebKit team may still be ironing out the details.